public class Example12_2 { 
   public static void main(String args[]) { 
       Thread speakElephant;
       Thread speakCar;
       ElephantTarget elephant;
       CarTarget car;
       elephant = new ElephantTarget();
       car = new CarTarget();
       speakElephant = new Thread(elephant) ;
       speakCar = new Thread(car);
       speakElephant.start();
       speakCar.start();
       for(int i=1;i<=15;i++) {
          System.out.print("����"+i+"  ");
       }  
   }
}
class CarTarget implements Runnable {
    public void run() {
        for(int i=1;i<=20;i++) {
            System.out.print("�γ�"+i+"  ");
        }
    }

    class ElephantTarget implements Runnable {
    public void run() {
        for(int i=1;i<=20;i++) {
            System.out.print("����"+i+"  ");
        }
    }
}
